Multiple sash window operating mechanism



April 30, 1957 R. c. WRIGHTFIELD MULTIPLE SASH wmoow OPERATING MECHANISM 4 Sheets-Sheet 1 Filed Aug. 10, 1953 fmJe 72%07 Raga/2 Z Jrz'gfzifi'eki 91 April 30, 1957 R. c. WRIGHTFIELD 2,790,212

MULTIPLE SASH wmnow OPERATING MECHANISM P 30, 1957 R. c. WRIGHTFIELD 2,790,212

MULTIPLE SASH WINDOW OPERATING MECHANISM Filed Aug. 10, 1953 4 Sheets-Sheet 5 i, ll

I'IIIIIIII4 IIIIIIIIIL'IIJ'I" r i i @g 29 L/ UWHWI 3025" b lwz" April 30, 1957 R. c. WRIGHTFIELD 2,790,212

MULTIPLE SASH WINDOW OPERATING MECHANISM Filed Aug. 10, 1.953 4 Sheets-Sheet 4 United States Patent 6 MULTIPLE SASH WINDOW OPERATING MECHANISM Ralph C. Wrightfield, Clinton, Iowa, assignor to Curtis Companies Incorporated, Clinton, Iowa, a corporation of Iowa Application August 10, 1953, Serial No. 373,196

12 Claims. (Cl. 20-42) This invention relates to an improved multiple sash window operating mechanism characterized by the ability to open or close a control sash or sashes, on one hand, and a controlled sash or sashes, on the other hand, to any positions upon predetermined movements of the control sash.

In one type of multiple sash window a plurality of sashes are supported for swinging opening and closing movements about parallel axes. A suitable operator, such as a crank mechanism, is provided to open and close one of the sashes. This one sash is interconnected with the other sashes to pickup the same upon prede termined movements and thus to open or close the other sashes as desired by manipulation of the one sash.

In the apparatus herein described the control sash is pivotally attached to a rider which embraces and slides upon a lengthy movable bar. The other sashes are pivotally connected to the bar so that longitudinal motion of the bar opens and closes them in unison. The rider has a tumbler pivoted thereto for rotation about an axis transverse to the length of the bar and spaced from the bar by less than the radial sweep of the tumbler. The tumbler coacts with a pair of spaced windows in the bar which can receive the tumbler in erect position and with a pair of steps or shoulders formed in the bar between the windows and against which the tumbler jams to open or close the sashes in unison.

With the apparatus described herein, the control sash can be moved to any position without picking up the controlled sash. This is done by an uninterrupted movement of the rider which causes the tumbler to extend into a window of the bar and tumble rather than engage a shoulder on the bar. However, if it is desired to pick up the controlled sash for movement in either direction, this can be done by a short retracting motion of the control sash to cause the tumbler to ride over shoulder after tumbling without riding into the opposed window. Upon resumption of the original opening or closing control sash movement, the tumbler seats against the shoulder to move the bar, and the controlled sashes, in unison with the control sash. Bythis action, it is possible to obtain all combinations of control and controlled sash position.

It is, therefore, a general object of the present invention to provide an improved multiple sash window and operating mechanism therefor wherein opening and closing movement of a control sash or sashes selectively serves to open and close all the sash as desired to achieve any combination of degrees of opening of the control sash or sashes, on one hand, and degrees of opening of the controlled sash or sashes, on the other hand.

Another object of the present invention is to provide an improved operating mechanism for a multiple sash window which is capable of picking up the controlled sash as desired and is characterized by simplicity of construc-' vide an improved operating mechanism for a multiple sash window which utilizes a simple tumbler mechanism to achieve selective operation of the control sash or sashes singly or of all the sashes in unison, as desired.

Further, it is an object of the present invention to provide a control mechanism for a multiple sash window in which a control sash or sashes, on one hand, or all the sashes, on the other hand, may be moved to any desired degree of opening and wherein the operating mechanism serves to apply closing torque to all the sashes simultaneously and with all the sashes closed when clos understood by reference to the following description taken in connection with the accompanying drawings, in which:

Figure 1 is a fragmentary view in perspective of a complete window embodying the operating mechanism of the present invention;

Figures 2, 3, 4, and 5 are enlarged views in vertical section showing various operative positions of the sash of the window of Figure 1;

Figure 6 is an enlarged, fragmentary portion of Figure 2;

Figure 7 is a fragmentary, cross-sectional view through axis 7-'7, Figure 6;

Figure 8 is a fragmentary, cross-sectional view through axis 8-8, Figure 6;

Figure 9 is a fragmentary cross-sectional view through axis 9-9, Figure 6;

Figure 10 is an exploded view in perspective of a fragmentary portion of the operating bar' of the unit of Figures 1-9 and the rider mechanism;

Figure 11 is a fragmentary, cross-sectional view through axis 11-11, Figure 6, showing the control sash in a somewhat more closed position than the controlled sashes;

Figure 12 is a view like Figure 11 but showing the control sash being opened from the position with all sashes closed;

Figure 13 is a view like Figure 12 but showing the control sash opened to a further extent in relation to the controlled sashes;

Figure 14 is a view like Figure 13 but showing the control sash closed somewhat after the opening movement of Figure 13 and conditioned to open the sashes in unison.

Figure 15 is a view like Figure 14 showing the control sash closed further from the position of Figure 14;

Figure 16 is like Figure 15 but showing the control sash closed still further and conditioned for retracting movement to pick up all the sashes for closure in unison;

Figure 17 is a view like Figure 16 showing the control sash opened from the position of Figure 16 to condition the tumbler to permit closure of the sashes in unison;

Figure 18 is a view like Figure 17 but showing an alternative embodiment of the operating bar and rider structure;

Figure 19 is a view like Figure 1 3 but showing the alternative embodiment of Figure 18; and

Figure 20 is a view like Figure 14 but showing the alternative embodiment of Figure 18.

top frame member 20b, and a pair of side frame members 20c. These frame members are mounted in a suitable openingprovid-ed in the walls W of the building struc-I' ture. The window includes a lowermost sash 22, which Patented Apr. 30, 1957 constitutes the control sash. By its opening and closing movements, hereafter described in detail, this control sash opens and closes the other sash. Above and aligned with the control sash are a pair of controlled sashes 24. Each of.the sashes 22' and '24 is movably secured to the frame by a pair of arms 26. As shown, these arms are pivotally secured to brackets 27 which bridge the sash operating bars 36. The opposite end of each arm 26 is pivotally secured to the side stile of each sash at pivot point 26a.

The control sash 22 is opened and closed by extending and retracting movements of the rigid chain 34b, as hereafter described. Thisiinpar-ts up and down move ments to the rider. 223. This rider. embraces and slides upon the verticalv operating bar 3% and isthusconstrained to vertical up and down movements .inthevertical groove.

Zlldformedin each of thesideframemembers 2%. This construction is shown in cross-sectional view in Figure 8. The operating'connection between the rider 28 and the control sash 22'is defined by the arms 22a, Figure 2,

which are attached to the upper corner of the sash 22 and extend upwardly and rearwardly to receive the pin 28:; of the rider 2%. As is shown in Figure ll, the pin 28:: has a horizontal orientation and the arms 22a seat thereover. The snap rings 32 secure the arms 22a in place.

Opening and closing motions are imparted to the control sash 22 by the crank mechanism indicated generally at 34, Figure 2. This mechanism may be of any one of many constructions known to the art. In the particular form shown in the figures, the crank 34a causes the erect'able chain 34b to extend or retract to a greater or lesser extent in accordance with the crank rotations. The end of the chain is attached to the bottom stile 22b of the sash 22.-so as to move the stile outwardly or inwardly in accordance with rotations of the crank 34a. The sash 22 is free to swing to opened position since the arms 26 can rock and the rider 28 can shift vertically. Thus, as the sash. is swung to opened position the point 26a moves downwardly and outwardly along the are 36, Figure 2, and the rider 28 moves downwardly. The control sash is shown in opened position in Figure 3.

It will be noted that the control sash 22-is opened and closed by extension or retraction of chain 34b to open or close the same directly. On the other hand, the con! trolled sashes 24 are opened and closed by longitudinal rising or descending motions of the bar 30 which. shifts the pins 27a up and down to thus open and close the. sash.

The positions of the sashes 24 are adjusted in relation to each other and to the control sash 22 by the mechanism associatedwith the units 27, Figures 6 and 9. Each of these units includes a base plate 275, which has a groove in W-hichthc rider 270 is slideably disposed. Thisslider carriesthe pin 27a upon which the arm 26-rides. The groove'or'track for the rider 27c is bridged by the adjusting plate 27d which is secured to the base plate27b and threadeclly carries a pair of spaced pointedset screws 27e. These screws are received in the spaced openings 27] of the rider 27c.

The spacing of the openings 27f isslightly smaller than the spacing of the screws 27c. screwed inwardly, their conical end portions bear on op,- posite edges of the openings 27 One screw thus tends to force the rider 27c upwardly and the other screw tends to force it downwardly. By relatively adjustingthe screws, the'rider can be forced to any desired position within the range of adjustment. The parts-particularly the size of the screws 27:? and the spacing of. the holesupwardly. and rearwardly from their top corners. ,As

shown in Figure 7, each of these arms has an opening which receives one of the pins 39a which entends ho1 izon- Thus, as the screws are.

tally from the vertical operating bar 30. The pins 30a are solocated as to anchor the sashes 24 in parallel relationship to each other or so nearly so that adjustment of screws 27@ will take up the error. When the operating bars 39 are pulled downwardly, as hereinafter described, the pins 30a, Figure 2, descend and the sashes 24 open. The sashes 24 are shown in the opened position in Figures 4 and 5.

As is further described in detail hereafter, the rider 28 is releasably connected to the operating bar 34 by movements of the control sash 22. These movements permit the user to pick up or release the controlled sashes as desired and thereby permit adjustment of the window to any desired degree of opening of the control sash and any desired degree of opening of the controlled sashes. The positions of the controlled sashes may be more or less opened than the control sash, as desired. These various combinations of positions are shown in the views of Figures 2, 3, 4, and 5.

The rider 28 is shown in exploded view in Figure 10. It consists of a channel-shaped backplate 28b with pro truding ears 28c Which-are received in the apertures 28d of the cover 282. The cars 28c are peened or bent over, as shown in Figure 6, to securethese two plates in assembled relation. The plate 28 is sandwiched between the backplate 28b and the cover 282 and has apertures 28g which receive the base portions of the ears 280. The intermediate plate 28] is of channel-shape and its side portions 28h seat against the cover plate 28c to form atight unitary structure in which the spacing between plates 28, and 23e is fixed by the depth of the sides 28!: of plate 28 and the spacebetween the web portion of the channel-shaped backplate 28b and-the intermediate plate 28 is determined by the length of the side flanges 23 of the backplate 28b.

The intermediate plate 23f has a window 23k with a pair of apertured protruding ears 28-1 on each side thereof and extending towards the cover 23c. A tumbler 23m has outwardly extending trunnion portions 281': which are received between the respective ears 28-1, as shown in Figure 8.

A leaf spring 230 is sandwiched between the cover 282. and the intermediate plate 28f. This leaf spring has an arcuate portion 28p which seats against and extends partially about the rear face of the tumbler 28m. The spring pressure exerted by the spring 280 against the tumbler 28m permits the tumbler to retract in accordance with the indentations of the operating bar andthus to bear against the surface of that bar at all times while at the. same time preventing unlimited downward tilt of the tumbler. The springopposition to down tilt of the tumbler is such as to assure a seatingengagement of the tumbler against the lowershoulder 36 as shown in Figure 14..

The operating bar 3% is of channel shape with an indentedweb portion 30b, Figure 10, defining a track in which the tumbler 23m rides. The side or flange portions 300 of the operating bar 39 are of such depth as to fit snugly but slideably within the rider28, asshown in Figure 8;

Each operating bar 30 has .a pair of spaced windows 30d formed in the web'portion 30band separated by an intermediate intended web portion 3%. The latter has sloping surfaces 30] which form shoulders against which the tumbler 28m canseat, as shown in Figures 14 and 17.

As shown in Figure 7, the pins 30a are mounted in the W$b PQI'.tiOIl 30b of the control barltl.

Practical. operation When the sashes are inthe initially closed positions of FigureZ and crank 34a is turned. tov tilt the lower or-control sash' 22 in theopening. direction,.the rider 28 do scends, as'shown in Figure 3. If the sashes were initially closed in unison, thetumbler28m'will havethe upward tilt shown infigurelZ sothattherider 28descendsfreely 78 without causing seating engagement of the tumbler 28m and either of the shoulders 30 Thus the tumbler rides over the lower shoulder 30 into the lower window 30d and thereafter rides in the web 30b of the control bar. Consequently, the lower sash may be opened singly and without picking up the upper sashes. This position is shown in Figure 3. The position of the tumbler during this motion and while it is passing through the lower window SM is shown in Figure 13. The dotted line view of this figure shows the position of the tumbler after the window has been passed.

If it is thereafter desired to pick up the upper or controlled sashes and to open all sashes in unison, the operator can turn crank 34a to close sash 22 from either the solid line or the dotted line relative position shown in Figure 13 to cause the tumbler 28m to tumble in the lower window 30d to the down tilted position as shown in Figure 14. This motion occurs without moving the upper sashes since the tumbler 28m rides against the face of the web 30b, as shown in the dotted lines of Figure 3, until the lower window 30d is reached, at which time the tumbler fits into the window and tips downwardly, as shown in Figure 14. Eventually, the position of Figure 14 is reached where the tumbler seats against the lower shoulder 38 The operator is advised that the Figure 14 position is reached by the audible click of the tumbler as it snaps into the indentation a in response to pressure of the spring 280.

From the relative position of Figure 14 the control sash may be opened further. Since the tumbler 28m is now seated against the lower shoulder 30], the rider 28- as it descends in response to opening movement of the control sash 22-pushes downwardly on the operating bar 30. The operating bar thus moves in unison with the rider 28 and all the sashes open in unison, as shown in Figure 4.

From the position of Figure 14, the control sash may be closed as desired and individually so closed, since the tumbler 28m is tilted downwardly and thus does not engage either of the shoulders 30 Figures 15 and 16 illus trate two positions of such control sash closing movements.

If it is desired to open the control sash to a greater extent than the controlled sashes 24, the control sash 22 is closed until the tumbler 28m rides into the open window 30d, as shown in Figure 16. The operator can ascertain this condition by the audible click that occurs when the spring 280 forces the tumbler 28m into this window. The control sash 22 may then be opened by appropriate rotation of crank 34a. The tumbler rides over the shoulders 30 as shown in Figures 12 and 13 and thus permits opening of the lower sash to any degree desired without altering the opened positions of the controlled sashes 24.

The sashes may be closed in unison by closing the control sash 22 until the tumbler is in the position of Figure 16, namely extending into the upper window 30d. Opening movement of the control sash 22 from this position causes the tumbler 28m to tilt to the position shown in Figure 17 and to snap against the upper shoulder 30 The audible snap advises the operator that the tumbler is seated against the shoulder. Closure of the control sash, with the incident upward movement of the rider 28 simultaneously shifts the operating bar 30 in the upward direction because of the engagement of tumbler 28m with the upper shoulder 30f.

It will be observed from the foregoing description that the lower sash 22 may be opened and closed directly by the operation of operating handle 30a. If it is desired to pick up the upper sashes for opening or closing movements in unison with the lower sash 22, this may be done by executing reversed movement, unless, of course, the tumbler 28m is already conditioned to cause the sashes to operate in unison, in which event the reversed movemen; is unnecessary.

' the rider 28 and the operating bar 30. The various parts of this structure are identified-with the same reference numerals as are used in Figures 1 to 16 with the number added. In the operating bar 130, Figure 18, the web part 13% carries a button which defines a pair of shoulders 130 against which the tumbler 128m seats. In this structure the tumbler 128m rides over the button 130e, as shown in Figure 18, when it is tilted upwardly and the lower or control sash 22 is opened in relation to the controlled sashes. However, it the control sash is opened until the tumbler snaps over the lower shoulder 130f, then closure of the lower sash closes the sashes in unison.

In the apparatus of Figures 18-20, the control sash can be closed in relation to the controlled sashes when the tumbler 128m is tilted downwardly, as shown in Figure 20. Also, when the tumbler is tilted downwardly, and the control sash is closed until the tumbler snaps on the upper shoulder 130 the control sash, when then opened further, opens the sashes in unison.

The tumbler 128m can be moved from the up-tilted position of Figure 18 to the down-tilted position of Figure 20 by opening the control sash until the tumbler extends into the lower window 130d and then closing the control sash, thus causing the tumbler to extend into the window and tumble. The operator hears an audible click when the tumbler extends into the window and thus is advised when the tumble has occurred. To move the tumbler 128m from the down-tilted position of Figure 20 to the up-tilted position of Figure 18, the operator can close the control sash in relation to the controlled sashes until the tumbler extends into the upper window 130d, an event indicated by an audible click. Control sash opening movement thereafter will cause the rider 128 to descend and will tilt the tumbler 128m to the position of Figures 18 and 19.

It will be observed that the operation of the unit of Figures 18-20 is identical with that of Figures 1-17 in that the sashes may be opened to any desired relative position by actuation of the control sash. However, in the unit of Figures 18-20, the control sash must be closed beyond the relative position where it applies closing torque to all sashes (Figure 20) to pick up the controlled sashes for opening. In the unit of Figures 1-17, this is not necessary as the rider 28 is in the position of Figure 17 when the sashes are all closed and after torque has been exerted upon them and the lower sash is opened from this position to that of Figure 13 to tumble the tumbler for opening the controlled sashes as shown in Figure 14.

It will be noted that in the form of Figures 1-17, the shoulders 30f are between Windows 30d and face each other. In the form of Figures 18-20, shoulders 130i are likewise between the windows 130d but face the respective windows rather than each other. It will also be noted that the axis of tumble of the tumbler 28m is held closer to the web 30b of the bar 30 than the radial sweep of the tumbler, thus preventing tumble except when the tumbler extends into one of the windows.

While I have shown and described specific embodiments of the present invention, it will, of course be understood that various modifications and alternative constructions may be made without departing from the,

true spirit and scope thereof. I, therefore, intend by the appended claims to cover all modifications falling within their true spirit and scope.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. An operating mechanism for a window having a plurality of swingable sashes, the mechanism comprising in combination: a bar attached to one sash to open and close the same when shifted longitudinally, the bar having a longitudinal face with a pair of longitudinally spaced windows and defining a pair-ofshoulders be-v w e an acing h w dows an spac therefr a rider mounted for longitudinal shifting movementalong the bar and attached to another sash to shift lengthwise of the bar as said other sash swings in relation to said first mentioned sash; a tumbler carried by the rider and mounted for rocking motion about an axis spaced from and generally perpendicular to the length of the bar, the distance between said axis and the face being less than the radial sweep of the tumbler to normally hold the same against tumble, the tumbler being of conformation to engage the shoulders and fit into the windows; and yielding means urging the tumbler against the face of the bar.

2. An operating mechanism for a window haying a plurality of swingable sashes, the mechanism comprising in combination: a lengthy bar attached to a sash to open and close the same when shifted longitudinally, the bar having a longitudinal face with a pair of longitudinally spaced windows and defining a pair of shoulders between the windows and facing each other; a rider mounted for longitudinal shifting movement along the bar and attached to another sash to shift lengthwise of the bar as said other sash swings in relation to said first mentioned sash; a tumbler carried by the rider and mounted for rocking motion about an axis spaced from and generally perpendicular to the length of the bar, the distance between said axis and the face being less than the radial sweep of the tumbler to normally hold the same against tumble, the tumbler being of conformation to engage the shoulders and fit into the windows; and

- yielding means urging the tumbler against the face of the bar.

3. An operating mechanism for a window having .a plurality of swingable sashes, the mechanism comprising in combination: a bar attached to one sash to open and close the same when shifted longitudinally, the bar having a face with a pair of longitudinally spaced windows and defining a pair of shoulders between windows and spaced therefrom; a rider mounted for longitudinal shifting movement along the bar, the rider being attached to another sash to slide, lengthwise of the bar as the said other sash swings in relation to said first mentioned sash; a tumbler carried by the rider and mounted for rocking motion about an axis spaced from and generally perpendicular to the length of the bar, the distance between said axis and theface being less than the radial sweep of the tumbler, the tumbler being of conformation to engage the shouldersand fitinto the windows; and yieldthe-same and connected to one of the sash to, open and close the same upon such movement, the bar having a longitudinal face with a pair of longitudinally spaced windows and defining .a pair of shoulders between the windows; a rider mounted for longitudinal shifting movement with respect to the bar and attached to another sash to shift lengthwise of the bar as said other sash swings in relation to said first mentioned sash; a tumbler carried by the rider and mounted for rocking motion about an axis spaced from and generally perpendicular to the length of the bar, the distance between said axis and the face being less than the radial sweep of the tumbler, the tumbler being of conformation to engage the shoulders and to' fit into the windows; and yielding means urging the tumbler against saidface of said bar.

5. A window comprising in combination: a window frame having a pair of side stiles; a plurality of sash h'aving'side rails; links pivotally connected. to the side rails intermediate their ends and to the side stiles supporting the sashes in vertical array for parallel motions to o en Wease Bas on; en h b -m un ed. ja e tto one stile for longitudinal movements and pivotally o ne ted o a sas o p n and lo e th sam pon such longitudinal movements, the bar haying a longitudinal face with a pair of spaced windows and, defining a pair of shoulders between the windows; a rider mounted for longitudinal shifting movements with respect to the bar and pivotally connected to another sash to open and close the same upon movement in the longitudinal direction of the bar, the rider having interengaging conformations with the bar to secure the same for travel along the bar; a tumbler carried by the rider and mounted for rocking motion about an axis spaced from and generally perpendicular to the length of the bar, the distance between axis and the face being lms than the radial sweep of the :tumbler, the tumbler being of conformation to engage the shoulders and fit into the windows; and yielding means urging the tumbler against the face of the bar.

6. Anoperating mechanism for a window having a plurality of sash, the mechanism comprising: a lengthy bar connected to one sash andadapted to open and close the same upon longitudinal movement, the bar defining an indented longitudinal track; a rider with conformations engaging the bar to slide thereon, the rider being 0onne cted to another sash to open and close the same upon movement in the lengthy direction of the bar; a tumbler rockably carried by the rider for engagement with the track and for rotation about an axis spaced from the bar by .atzdistance lessthan the radial sweep of the tumbler, theaxis being substantially perpendicular to the length of the bar,fthe track having a pair of longitudinally spaced windows adapted to receive the tumbler in erect positionahd having stepped, shoulder-def ning conformations between the windows; and means urging the tumbler against the bar.

' 7. In a'window of the type having a plurality of sashes eachsupp orted in the same manner by a link pivotally connected thereto and pivot supports adjacent one edge of the sash and at the free end of eachlink; a lengthy bar'pivotally connected to one pivot support for one sash; a rider having interengaging conformations to slide longitudinally of the said bar and pivotally'com nected to said one pivot support for another sash; means supporting the other pivot support for each sash; a, tumbler carried by the rider and adapted to rest against the bar, thebar haying a pair of spaced windows adapted to receive the tumbler to tiltthe same ,and defining a pair of shoulders between the windows; and means urging the tumbler against the bar.

8. ln a window of the type having a plurality of sashes each supported in the same manner bya link pivotallyconnected thereto and pivotsupPorts'adjuht one edge of the sash and at the free end of each link: a" lengthy bar pivotally connected to one piyot support ,fornne sash; a rider haying interengaging conformations the bar to slide longitudinally of the said bar and pivotallyconneetedtosaid one pivot support for another sash; means individually adjustable in the direction of movement ofthe' bar and supporting the other pivot support for each sash; a tumbler carried by the rider and adapted to rest against the bar, the bar having a pairof spaced windows adapted to receive the tumbler to tilt t S m an dsfinit s @Pfii o hou d r b wc h W ndo sn me eins th mbler agains the bar.

9. In a window of the type having a plurality of sashes each snpported in the samemanner by a link pivotally connectedthe'reto andltiivot supports adjacent one edge of the sash and atlthe free end of ea rililinkz a leng th y bar pivotally connected tol one pivot support for "one h; r d e ibrac'ing'the ba o s id ong tud na l e eon a d ivot ly on e ted o a donepivot. suppo for anothersash; means supporting the other pivot sup- PQ I f tieachusasma tumbler carried by the rider and adapted to rest againstrthe bar, the bar having a pair of spaced windows adapted to receive the tumbler to tilt the same, and defining a pair of shoulders between the windows and facing each other; and means urging the tumbler against the bar.

10. In a window having a plurality of sash, the improvement comprising: a lengthy bar connected to one sash and adapted to open and close the same upon longitudinal movement; a rider with conformations engaging the bar to slide thereon, the rider being connected to another sash to open and close the same upon movement in the lengthy direction of the bar; a tumbler rockably carried by the rider for rotation about an axis spaced from the bar by a distance less than the radial sweep of the tumbler, the axis being substantially perpendicular to the length of the bar, the bar having a pair of longitudinally spaced windows adapted to receive the tumbler in erect position and having a button located between the windows to define shoulder conformations facing the windows; and means urging the tumbler against the bar.

11. In a window having a plurality of sash, the improvement comprising: a lengthy bar connected to one sash and adapted to open and close the same upon longiiudinal movement; a rider with conformations engaging the bar to slide thereon, the rider being connected to another sash to open and close the same upon movement in the lengthy direction of the bar; a tumbler rockably carried by the rider for rotation about an axis spaced from the bar by a distance less than the radial sweep of the tumbler, the axis being substantially perpendicular to the length of the bar, the bar having a pair of longitudinally spaced windows adapted to receive the tumbler in erect position and having an indented face defining a pair of shoulders between the windows and facing each other; and means urging the tumbler against the bar.

12. In an operating mechanism for a window having a plurality of vertically spaced sashes; a lengthy vertical bar attached to at least one sash and operable to open and close the same when moved longitudinally; a rider vertically movable on the bar and connected to another sash to open and close the same when vertically moved, the bar having a pair of spaced windows and defining a pair of shoulders therebetween; a tumbler carried by the rider for rocking motion about a horizontal axis and of conformation to fit into the windows and engage the shoulders; and a spring on the rider extending about the tumbler on the side opposite the bar to yieldably 20 hold the same erect and against the bar.

Wiley Oct. 4,' 1938 Moseley Aug. 25, 1942 

